<template>
  <div>
    <div class="box-a"></div>
  </div>
</template>

<script>
export default {};
</script>


<style scoped>
.box-a {
  width: 100px;
  height: 100px;
  background: orange;
  position: relative;
  animation: myframe 5s infinite;
}

@keyframes myframe {
  from {
    top: 0px;
  }
  to {
    top: 200px;
  }
}
</style>